Updated users to get exams related to their level

src/interfaces/exam.ts

@@ -3,6 +3,7 @@ import {Module} from ".";
 export type Exam = ReadingExam | ListeningExam | WritingExam | SpeakingExam | LevelExam;
 export type Variant = "full" | "partial";
 export type InstructorGender = "male" | "female" | "varied";
+export type Difficulty = "easy" | "medium" | "hard";
 
 export interface ReadingExam {
 	parts: ReadingPart[];
@@ -12,6 +13,7 @@ export interface ReadingExam {
 	type: "academic" | "general";
 	isDiagnostic: boolean;
 	variant?: Variant;
+	difficulty?: Difficulty;
 }
 
 export interface ReadingPart {
@@ -29,6 +31,7 @@ export interface LevelExam {
 	minTimer: number;
 	isDiagnostic: boolean;
 	variant?: Variant;
+	difficulty?: Difficulty;
 }
 
 export interface ListeningExam {
@@ -38,6 +41,7 @@ export interface ListeningExam {
 	minTimer: number;
 	isDiagnostic: boolean;
 	variant?: Variant;
+	difficulty?: Difficulty;
 }
 
 export interface ListeningPart {
@@ -69,6 +73,7 @@ export interface WritingExam {
 	minTimer: number;
 	isDiagnostic: boolean;
 	variant?: Variant;
+	difficulty?: Difficulty;
 }
 
 interface WordCounter {
@@ -84,6 +89,7 @@ export interface SpeakingExam {
 	isDiagnostic: boolean;
 	variant?: Variant;
 	instructorGender: InstructorGender;
+	difficulty?: Difficulty;
 }
 
 export type Exercise =